User Manual V 1-4.XX User guide

12-18 Troubleshooting
Configuring the Faults and Warnings for Precharge
You can use Fault Select 1 and Warning Select 1 to enable
fault/warning conditions when the appropriate bit is set (1). If a bit is
clear (0) in Fault Select 1, you can choose to have the condition
reported as a warning by setting the bit in Warning Select 1. The
following are the bits that pertain to precharge:
Using Bus/Brake Opts to Change Precharge/Ridethrough
Options
You can use Bus/Brake Opts (parameter 13) to change how precharge
and ridethrough work. Bus/Brake Opts is a bit encoded word that
disables the following functions when the appropriate bit is set (1):
file:
Fault Setup
group:
Fault Config
This bit: With this text: When set, generates a fault when:
0 RidethruTime The ridethrough time exceeds 2 seconds.
1 Prechrg Time The precharge time exceeds 30 seconds.
2 Bus Drop
The bus voltage drops 150 volts below the bus tracker
voltage. This is the level where the drive would
normally enter ridethrough.
3 Bus Undervlt
The bus voltage drops below the level set in Line
Undervolts (parameter 27). This is the level where the
drive would enter ridethrough if it occurs before a 150
volt drop in bus voltage.
4 Bus Cycles>5
At least 5 ridethrough cycles have occurred within a 20
second period. This indicates a converter problem or a
problem with incoming power. Consider checking the
incoming power for a phase loss.
file:
Application
group:
Bus/Reg/Control
This bit: Has this definition:
0 Sets the bus voltage tracker slew rate to 10 volts/second.
1 Sets the bus voltage tracker slew rate to 5 volts/second.
2 Sets the bus voltage tracker slew rate to 0.5 volts/second.
3 Sets the bus voltage tracker slew rate to 0.05 volts/second.
4 Sets the bus voltage tracker slew rate to 0.005 volts/second.
5 Reserved. Leave zero.
6
Enables flux braking. This is covered in more detail in Chapter 9,
Applications.
7
Enables the DC hold feature. This is covered in more detail in Chapter 9,
Applications.
8 Enables fast flux up. This is covered in more detail later in this chapter.
9
Enables DC braking. This is covered in more detail in Chapter 9,
Applications.
10 Indicates that a chopper brake or other regenerative device is present.
11 Forces an exit from precharge after the precharge timeout.
12 Identifies the drive as a common bus converter.
13
Disables faults or warnings while the drive is disabled. This allows power
up and down the bus for a common bus system without faulting even if the
faults or warnings are enabled. For example, faults or warnings only occur
if the drive is running. This may be desirable when external power
supplies are used.